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SYSTEM-40 BTU MEASUREMENT SYSTEM
7.4 ANALOG INPUT(S)
Property
Default Value
Read-only or Writable
Object Identifier
Analog input 1 to 10
Read-only
Object Name
Various
Read-only
Object Type
Analog-input
Read-only
Present Value
REAL
Writable
Description
Analog-input,# Name
Read-only
Status Flags
(F,F,F,F)
Read-only
Event State
Normal
Read-only
Reliability
No-fault-detected
Read-only
Out-of-Service
FALSE
Writable
Update interval
100
Read-only
Units
Various
Read-only
Min-Present-Value
-1000000000
Read-only
Max-Present-Value
1000000000
Read-only
Resolution
0.000001
Read-only
Object Identifier
Function
Analog input 1
Energy rate
Analog input 2
Volume rate
Analog input 3
Supply temperature
Analog input 4
Return temperature
Analog input 5
Delta temperature
Analog input 6
Signal strength
Analog input 7
Signal quality
Analog input 8
Speed of sound
Analog input 9*
Peak energy rate
Analog input 10*
Average delta temp
*Time interval set by Trend Log Object
BACnet Engineering Units for Analog Inputs
(
Defaults
)
Energy rate:
kBtu/h
, tons, kW or MW
Volume rate:
gpm
, l/s, ft3/m or m3/h
Temperature:
°F
or °C
Signal strength: No units (0 – 100 counts)
Signal quality: No units (3 – 31 counts, 3 = best)
Speed of sound:
ft/s
or m/s